There are differences between the data available on the Environment Agency’s website and the National River Flow Archive, which time series should I use?

We work closely with the National Flow Archive to ensure the daily flow data we provide them with is the same as we hold in our archive. Over time there is a risk that there may be small differences for a small percentage of the record at a few sites. Whilst it is unlikely that these differences would have any impact the Environment Agency regard their data to be correct unless evidence can be provided to the contrary.